Event: Division 1

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Opponent Rating Result
James E Moreby 2400 ½ - ½
Graham DJ Keane 2179 ½ - ½
Finlo N Rohrer 1956 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2312 = (6535 + 400 * (1 - 0)) / 3)

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